Sexual bridging socially and over time: a simulation model exploring the relative effects of mixing and concurrency on viral sexually transmitted infection transmission.

Abstract:

BACKGROUND:Sexual partnerships between people at higher and lower risk for sexually transmitted infections (STIs) (i.e., bridging) occur through dissortative mixing and concurrent partnerships, yet the relative effects of these network patterns on population STI spread are poorly understood. GOAL:Using a stochastic model, the authors investigated the impact of mixing and concurrency on the spread of a persistent viral STI. STUDY DESIGN:A total of 1,050 populations were simulated of 1,000 subjects over 400 weeks with varied concurrency levels and mixing patterns. STI prevalence and the average number of secondary transmissions per subject were analyzed with regression. RESULTS:Mixing had a greater impact on prevalence for all groups, whereas concurrency was significant for only the lowest activity group. Mixing patterns moderated the magnitude of concurrency's impact on secondary transmissions. CONCLUSIONS:Through connecting subgroups of differential risk, sexual mixing facilitates dissemination of STIs throughout a population. Concurrency expedites transmission by shortening the time between sexual contacts among infected and susceptible persons, particularly during the highly infectious period.

journal_name

Sex Transm Dis

authors

Doherty IA,Shiboski S,Ellen JM,Adimora AA,Padian NS

doi

10.1097/01.olq.0000194586.66409.7a

subject

Has Abstract

pub_date

2006-06-01 00:00:00

pages

368-73

issue

6

eissn

0148-5717

issn

1537-4521

pii

00007435-200606000-00007

journal_volume

33

pub_type

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